Home / 20,975.95-28,946.28-11,415.43

Finding the Fourth Proportional to 20,975.95, 28,946.28 and 11,415.43

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Solution

The fourth proportional to 20,975.95, 28,946.28 and 11,415.43 is: 15,753.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.95 : 28,946.28 = 11,415.43 : x
  2. Step 2: Convert to fraction form
    20,975.95/28,946.28 = 11,415.43/x
  3. Step 3: Cross multiply
    20,975.95x = 28,946.28 × 11,415.43
  4. Step 4: Simplify right side
    20,975.95x = 330,434,233.10
  5. Step 5: Solve for x
    x = 330,434,233.10/20,975.95
  6. Step 6: Final answer
    x = 15,753.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.